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600 feet above tide, to the terrace on the east at an elevation of 537 feet, 
about 85 feet above low water in the river. The next section, about three 
miles south, shows low bottoms on each side of the river, but no second 
bottoms. The big terrace near the river is perhaps a little higher than on 
the county line, but two broad valleys appear farther east which greatly 
reduce its volume. The third section, between three and four miles 
farther south, shows low bottoms, less than a mile wide, mainly east of 
the river. The terrace rises from the flood plain to an elevation of from 
80 to 90 feet above low water, but soon descends to an elevation of only 
45 to 50 feet above datum, in the valley of Otter Creek. Erosion by the 
creek may account for the great reduction in the volume of the terrace, 
as shown by this section. The section at Terre Haute, 3144 miles farther 
south, shows about one mile of low bottoms on the west, then a second 
bottom rising about 80 feet above low water, then low bottoms to the 
bluff. On the east a rise of 50 feet reaches the edge of the terrace, which 
rises gradually but irregularly to an elevation of about 70 feet at the bluff 
three miles from the river. Two low ridges and two shallow valleys 
occur on this section, but in general the surface of the terrace is more 
uniform than farther north. The next section, about four miles farther 
south, shows about one mile of flood plain on the west and a narrow 
terrace rising about 45 feet above low water in the river. On the east 
the terrace, nearly level, is about four miles wide, having an elevation of 
about 45 feet above low water. The ridges of the Terre Haute section 
show faintly, but the surface in general is uniform. The section three 
miles farther south, through the village of Prairieton, shows a little more 
than two miles of flood plain about equally divided by the river. The 
terrace about four miles wide has an average elevation of about 45 feet 
above low water. Honey Creek has cut a broad valley across the terrace, 
and a low ridge appears farther east. The next section, 3% miles farther 
south, shows one mile of flood plain west of the river, and a narrow 
terrace. On the east the low bottoms are 3% miles wide. A little island 
of gravel rising about 40 feet above low water, and a Darrow sand ridge, 
are the sole representatives of the great terrace farther north. This sec- 
tion continued eastward shows that Johnson’s Hill rises about 100 feet 
above low water in the river and that the valley of Prairie Creek, about 
one mile wide, has about the same elevation as the Prairieton terrace. 
It seems probable that Johnson’s Hill was an island in the old river, and 
that the valley of Prairie Creek was the eastern channel of the ancient 
